Question

How many quarter hours are there in 2 and 1/2 hours ? *



8

10

12

14

​

Answer 1

Answer:

option no . 2 = 10 is the answer

Answer 2

Answer:

There are 10 quarter hours in 2 and 1/2 hours.

So second option is the correct answer.

Step-by-step explanation:

Here given total time is 2 and half hour $= 2.5 \: hours$

We want to find here how many quarter hours in 2.5 hours.

We know, quarter hours means 15 minutes.

We know there are 4 quarter hours in one hour.

So, 1 hour has 4 quarter hours

By Unitary method,2.5 hours has $(4 \times 2.5) = 10$ quarter hours.

This is a problem of Algebra.

Some important Algebra formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Know more about Algebra,

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2) https://brainly.in/question/1169549